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Finding the Fourth Proportional to 12,970.55, 19,473.92 and 6,649.85

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Solution

The fourth proportional to 12,970.55, 19,473.92 and 6,649.85 is: 9,984.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,970.55 : 19,473.92 = 6,649.85 : x
  2. Step 2: Convert to fraction form
    12,970.55/19,473.92 = 6,649.85/x
  3. Step 3: Cross multiply
    12,970.55x = 19,473.92 × 6,649.85
  4. Step 4: Simplify right side
    12,970.55x = 129,498,687.28
  5. Step 5: Solve for x
    x = 129,498,687.28/12,970.55
  6. Step 6: Final answer
    x = 9,984.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.